matlab 中Z = X.*exp(-X.^2 - Y.^2);具体意思?具体代码：[X,Y] = meshgrid(-2:.2:2); Z = X.*exp(-X.^2 - Y.^2); [DX,DY] = gradient(Z,.2,.2); contour(X,Y,Z); %等高线figure,quiver(X,Y,DX,DY);

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matlab 中Z = X.*exp(-X.^2 - Y.^2);具体意思?具体代码：[X,Y] = meshgrid(-2:.2:2); Z = X.*exp(-X.^2 - Y.^2); [DX,DY] = gradient(Z,.2,.2); contour(X,Y,Z); %等高线figure,quiver(X,Y,DX,DY);
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matlab 中Z = X.*exp(-X.^2 - Y.^2);具体意思?具体代码：[X,Y] = meshgrid(-2:.2:2); Z = X.*exp(-X.^2 - Y.^2); [DX,DY] = gradient(Z,.2,.2); contour(X,Y,Z); %等高线figure,quiver(X,Y,DX,DY);
matlab 中Z = X.*exp(-X.^2 - Y.^2);具体意思?
具体代码：
[X,Y] = meshgrid(-2:.2:2);
Z = X.*exp(-X.^2 - Y.^2);
[DX,DY] = gradient(Z,.2,.2);
contour(X,Y,Z); %等高线
figure,quiver(X,Y,DX,DY);

matlab 中Z = X.*exp(-X.^2 - Y.^2);具体意思?具体代码：[X,Y] = meshgrid(-2:.2:2); Z = X.*exp(-X.^2 - Y.^2); [DX,DY] = gradient(Z,.2,.2); contour(X,Y,Z); %等高线figure,quiver(X,Y,DX,DY);
exp()是指以e为底数的指数
Z=X.*exp(-X.^2-Y.^2)即指：
至于字母后面的点“.”代表这是一个向量

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